<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>水印</title>
  <style>
    body {
      margin: 0;
      padding: 0;
    }

    .mobile {
      width: 414px;
      height: 818px;
      margin: auto;
      background: url('./images/bg.jpeg') top left/100% 100% no-repeat;
    }

    .water {
      position: relative;
      z-index: 2;
      height: 100%;
      background-image: url('./images/water.png'), url('./images/water.png');
      background-position: top left, top right;
      background-repeat: no-repeat repeat;
      background-color: rgba(0, 0, 0, 0.3);
    }
  </style>
</head>

<body>
  <div class="mobile">
    <div class="water"></div>
  </div>
</body>

</html>